Check the upper Oldham coupler plate for any signs of damage. The coupler plate is located in the printer's main gear drive.
Damage in the upper Oldham coupler plate will cause the unit not to push toner to the PC drum, thus the blank print. Replace the main gear drive to fix the issue.
- 40X7594 – Main gear drive
Oldham Coupler assembly in good condition
Damaged or chipped Oldham Coupler assembly
Note: The Developer dogbone in the printer can be broken off due to removal of the imaging unit when the door not completely open. The same dogbone may also be stuck in the gear for some reason.